I got this error on boot
'mount: error while loading shared libraries: libudev.so.0 : no such file or directory' error while booting

Then i followed this guide http://goo.gl/56xzFe

But apt-get install libudev0 on recovery shell gave this error :

W:Not using locking for ready only lock file /var/lib/dpkg/lock
E:Unable to write to /var/cache/apt
E:The package list or status file could not be parsed or opened

Then , i tried to delete the lock file

cd var/lib/dpkg/
rm lock

It gave me this error

rm:cannot remove 'lock' : Ready-only file system